docs: def p_jsonpath_operator_jsonpath(self, p):
          """jsonpath : NUMBER operator NUMBER
                      | FLOAT operator FLOAT
                      | ID operator ID
                      | NUMBER operator jsonpath
                      | FLOAT operator jsonpath
                      | jsonpath operator NUMBER
                      | jsonpath operator FLOAT
                      | jsonpath operator jsonpath
          """
  
          # NOTE(sileht): If we have choice between a field or a string we
          # always choice string, because field can be full qualified
          # like $.foo == foo and where string can't.
          for i in [1, 3]:
              if (isinstance(p[i], jsonpath_rw.Fields)
                      and len(p[i].fields) == 1):
                  p[i] = p[i].fields[0]
  
          p[0] = _arithmetic.Operation(p[1], p[2], p[3])